<!DOCTYPE html>
<html>
  <head><title>Test accent/accentunder</title></head>
  <body>
    <math displaystyle="false">
      <munderover accentunder="true" accent="true">
	<mo>&#x2211;</mo>
	<mi>a</mi>
	<mi>b</mi>
      </munderover>
    </math>
    <math displaystyle="false">
      <munder accentunder="true">
	<mo>&#x2211;</mo>
	<mi>a</mi>
      </munder>
    </math>
    <math displaystyle="false">
      <mover accent="true">
	<mo>&#x2211;</mo>
	<mi>a</mi>
      </mover>
    </math>
  </body>
</html>